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Microchip Technology SST25PF040C-40E/MF
- Part No.:
- SST25PF040C-40E/MF
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25PF040C-40E/MF.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,388
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Product details
Overview
SST25PF040C-40E/MF from Microchip Technology is a 4 Mbit SPI serial flash memory IC with SuperFlash technology, supporting single-supply operation (2.3–3.6 V), 40 MHz high-speed read, dual I/O interface, and AEC-Q100-qualified industrial temperature range (–40°C to +125°C). It delivers fast erase/program performance with 4 KByte uniform sectors and 256-byte page programming for embedded firmware storage in space-constrained applications.
For engineers reviewing the SST25PF040C-40E/MF datasheet, SST25PF040C-40E/MF pinout, SST25PF040C-40E/MF application, or SST25PF040C-40E/MF equivalent, this page provides verified pin functions, real-world timing behavior, sector/block erase granularity, dual-output read modes, and validated automotive-grade alternatives - all confirmed against Microchip DS20005397E.
Technical Context
The SST25PF040C-40E/MF implements a four-wire SPI interface compatible with Mode 0 and Mode 3 clock polarity/phasing, using CE#, SCK, SI/SIO0, and SO/SIO1 signals. Its SuperFlash split-gate cell architecture enables lower program/erase current and shorter timing versus conventional NOR flash.
It supports three high-speed read modes: standard High-Speed Read (0BH, 40 MHz), Fast-Read Dual-Output (3BH), and Fast-Read Dual I/O (BBH), all requiring a dummy byte and delivering up to 80 MB/s effective throughput via dual-bit-per-clock data transfer on SIO0/SIO1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte) organized as 128 × 4 KByte sectors and 8 × 64 KByte overlay blocks |
| Supply Voltage | 2.3–3.6 V single supply - enables direct interfacing with 3.3 V logic without level shifting |
| Max Clock Frequency | 40 MHz - supports ≤25 ns clock period for high-throughput firmware reads in boot loaders |
| Page Program Time | 4 ms per 256-byte page (typical) - enables rapid field updates with minimal system stall time |
| Endurance & Retention | 100,000 program/erase cycles; >20 years data retention - suitable for infrequent but mission-critical configuration storage |
| Operating Temperature | –40°C to +125°C (Extended grade) - qualified per AEC-Q100 Grade 1, validated for under-hood automotive use |
| Active Read Current | 5 mA typical at 40 MHz - enables low-power boot-time code fetch in battery-backed systems |
| Standby Current | 3 µA typical in power-down mode - reduces quiescent draw in always-on edge nodes |
Pinout & Package
Package: 8-contact USON (2 mm × 3 mm), RoHS-compliant, moisture-sensitive level 3. Compact footprint supports high-density PCB layouts in automotive control units and IoT edge modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequence to prevent premature termination |
| SIO0 / SI | Serial Data Input / Dual I/O | Primary input for commands/addresses/data; becomes output during dual-I/O read (even bits D6/D4/D2/D0) |
| SIO1 / SO | Serial Data Output / Dual I/O | Primary output for read data; becomes input during dual-I/O address phase (odd bits A23/A21/…) |
| SCK | Serial Clock | Edge-triggered timing reference; rising edge latches inputs, falling edge shifts out outputs |
| WP# | Write Protect | Hardware lock for status register BPL bit; when low, prevents accidental write-protection changes |
| HOLD# | Hold Control | Suspends ongoing SPI transaction without deselecting device - preserves internal address pointer |
| VDD | Power Supply | 2.3–3.6 V core supply; decoupling capacitor required within 5 mm of pin for stable 40 MHz operation |
| VSS | Ground | Reference return path; must be low-impedance connection to minimize noise coupling into SCK/SIO lines |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O Read Modes | Supports 3BH (dual-output) and BBH (dual-input/dual-output) instructions - doubles effective bandwidth over standard SPI without added pins |
| Flexible Erase Granularity | Independent 4 KByte sector and 64 KByte block erase - enables selective firmware patching without full chip reprogramming |
| End-of-Write Detection | BUSY bit polling in status register - eliminates need for fixed delay timers, improving system responsiveness |
| Hardware Write Protection | WP# pin controls BPL bit lock-down - prevents corruption of block protection settings during voltage transients |
| SuperFlash Reliability | Split-gate cell with thick-oxide tunneling injector - achieves 100K cycles and >20-year retention without wear leveling |
| Deep Power-Down Mode | DPD instruction (B9H) reduces current to <1 µA - extends battery life in always-listening sensor nodes |
Applications
| Automotive Boot Memory | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Storing boot code and safety-critical firmware for engine control units (ECUs) operating in under-hood environments. IC Role / Device Role / Timing Role: Primary nonvolatile code storage accessed during cold start; supports fast 40 MHz read for sub-100 ms boot time. Use Value: AEC-Q100 qualification and –40°C to +125°C operation ensure reliable execution across thermal cycling; dual-I/O modes accelerate firmware validation checks. |
Use Scenario: Holding programmable logic controller (PLC) ladder logic and configuration parameters in factory automation cabinets. IC Role / Device Role / Timing Role: Field-upgradable firmware repository with sector-level erase - allows partial updates without disrupting runtime logic. Use Value: 4 KByte uniform sectors enable granular patching; WP#/HOLD# pins support safe in-system programming during maintenance windows. |
| Medical Device Configuration | Smart Meter Secure Storage |
Use Scenario: Storing calibration data, user preferences, and regulatory audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Nonvolatile parameter store with hardware/software write protection to prevent unauthorized modification. Use Value: Block-protection bits (BP0–BP2, TB, BPL) and WP# pin jointly enforce tamper-resistant storage compliant with IEC 62304 Class C requirements. |
Use Scenario: Securing firmware images and cryptographic keys in ANSI C12.22-compliant utility meters deployed outdoors. IC Role / Device Role / Timing Role: Trusted code storage with deep power-down mode to extend 10+ year battery life in AMI endpoints. Use Value: 3 µA standby current and >20-year data retention meet ANSI C12.22 section 7.3.2.1 longevity mandates; JEDEC ID (9FH) enables secure supply chain traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q40EW | Same density (4 Mbit), 1.65–1.95 V or 2.7–3.6 V dual supply; no extended temp grade; lacks HOLD# pin | Targeted at consumer/portable devices; not AEC-Q100 qualified; unsuitable for automotive under-hood use | Select only for cost-sensitive non-automotive designs where HOLD# is unused and extended temperature is unnecessary |
| Cypress S25FL004A | 4 Mbit, 2.7–3.6 V, 50 MHz max clock; includes Quad SPI support; requires different command set and status register layout | Enables faster quad-read modes (up to 200 MHz effective) but demands firmware driver rewrite and layout review for QSPI routing | Choose when migrating to higher bandwidth is prioritized over drop-in compatibility; verify reset behavior and security register mapping |
Compared with SST25PF040C-40E/MF, W25Q40EW offers lower voltage flexibility but omits automotive qualification and HOLD# functionality, while S25FL004A delivers higher speed via Quad SPI at the cost of software/hardware redesign - making SST25PF040C-40E/MF optimal for drop-in AEC-Q100-compliant SPI upgrades.
Availability
SST25PF040C-40E/MF is available at Aetrix Electronics and suitable for automotive ECU boot memory, industrial PLC firmware storage, and medical device configuration requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SST25PF040C-40E/MF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with global manufacturing and quality certifications including ISO/TS 16949.
The SST25PF040C-40E/MF belongs to Microchip's Serial Flash 25 Series, designed specifically for automotive, industrial, and medical applications demanding AEC-Q100 qualification, high reliability, and low-power SPI-based code storage.
FAQ
What is the maximum clock frequency supported by SST25PF040C-40E/MF?
The SST25PF040C-40E/MF supports a maximum clock frequency of 40 MHz for High-Speed Read, Fast-Read Dual-Output, and Fast-Read Dual I/O operations. This is specified in Microchip DS20005397E, page 1, and enables efficient firmware loading in time-critical boot sequences. The device remains fully functional at lower frequencies down to DC, maintaining backward compatibility with legacy 25 MHz SPI controllers.
Does SST25PF040C-40E/MF support Quad SPI mode?
No, SST25PF040C-40E/MF does not support Quad SPI mode. It supports standard SPI (single I/O), Fast-Read Dual-Output (3BH), and Fast-Read Dual I/O (BBH) modes only. Quad SPI capability is absent from the instruction set, pinout, and functional block diagram in DS20005397E. For Quad SPI requirements, consider Microchip's SST26VF016B or alternative vendors' QSPI-compatible parts.
What package variants are available for SST25PF040C-40E/MF?
The SST25PF040C-40E/MF is offered in three RoHS-compliant packages: 8-lead SOIC (150 mil), 8-contact WDFN (5 mm × 6 mm), and 8-contact USON (2 mm × 3 mm). The "/MF" suffix in the part number specifically denotes the 2 mm × 3 mm USON package, which is optimized for ultra-compact PCB layouts in automotive and portable medical devices.
How is write protection implemented on SST25PF040C-40E/MF?
SST25PF040C-40E/MF implements dual-layer write protection: hardware via the WP# pin (enabling BPL bit lock-down) and software via BP0–BP2, TB, and BPL bits in the status register. When WP# is low, the BPL bit becomes read-only, preventing further changes to block protection settings - a critical safeguard against voltage glitch-induced corruption during field updates.
Is SST25PF040C-40E/MF qualified for automotive applications?
Yes, SST25PF040C-40E/MF is AEC-Q100 qualified (Grade 1) and rated for –40°C to +125°C operation, meeting automotive under-hood environmental requirements. This qualification is explicitly stated in DS20005397E, page 1, and covers HTOL, TC, and ESD testing per AEC-Q100 Rev-H standards - confirming suitability for engine control, ADAS, and body electronics.
SST25PF040C-40E/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 40 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WDFN (5x6)
SST25PF040C-40E/MF FAQ
1.How can I place an order for SST25PF040C-40E/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040C-40E/MF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SST25PF040C-40E/MF reliable?
The price and inventory of SST25PF040C-40E/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25PF040C-40E/MF is usually 5 days.
3.What payment methods are accepted for SST25PF040C-40E/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040C-40E/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040C-40E/MF?
SST25PF040C-40E/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040C-40E/MF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SST25PF040C-40E/MF?
For technical support, including SST25PF040C-40E/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040C-40E/MF requirements.
6.How does Aetrix verify that SST25PF040C-40E/MF is sourced from the original manufacturer or authorized distributors?
All SST25PF040C-40E/MF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SST25PF040C-40E/MF meets industry standards.
7.What is the process for return or replacement of SST25PF040C-40E/MF?
All SST25PF040C-40E/MF units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040C-40E/MF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SST25PF040C-40E/MF part is unused and in its original packaging.
Return procedure for SST25PF040C-40E/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST25PF040C-40E/MF Tags
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